When Fan Keqin observed in the corridor near the prison, he had already figured it out, so he agreed: "Yes, don't set up eyes near the prison." But we have to find a way to determine what's going on inside. Otherwise, once you find the wrong location of the combat reserve depot, I am afraid that it will also lead to the complete failure of the operation. ”

Hua Zhang nodded and said, "Actually, the possibility that the prison is a war reserve is quite large, but there is no way to be sure now." ”

"yes." Fan Keqin said: "We can see the sentry posts on those watchtowers. They are all little devil soldiers, but they are not puppet soldiers. Judging from this, it is indeed very likely that it is a combat reserve depot inside. But again, if you find the wrong one, it will really be a complete failure.

But...... Before we came back, when we were looking inside the three-story residential building, you noticed that there were two people wearing pseudo-government police uniforms and red armbands, walking to the south side.

That side must be the gate of the prison, and the arm bands worn by the two policemen should be the emblem of the prison guards. So it's not just the little devils who are guarding this prison. There must also be a puppet police officer in it. ”

"Yes." As soon as he said this, Hua Zhang also remembered and said, "You mean, we can make a fuss about the puppet police?" ”

Fan Keqin nodded and said, "I feel that it should be okay." In addition, we should send someone to check the information of that prison. It's best to find the person who built the prison in the first place. ”

Hua Zhang said: "It seems that it is really possible." While it's not too late, I'll contact Captain Wang. ”

"Don't." Fan Keqin said: "We'll check it ourselves tomorrow." Local libraries should have access to this information. In the architectural literature, we can look it up. I actually have another idea. ”

As he spoke, Fan Keqin took a pen and paper, began to draw a picture, and when he finished drawing, he said: "Actually, it's not that the monitoring point can't be established, but this trick may cost more manpower, but fortunately, there is nothing else to do locally now, so you see." ”

As he spoke, Fan Keqin pointed back and forth the simple drawings drawn on the paper with the tip of his pen and said, "This is the prison, one side is the city, and the other side is the suburbs. You see, if you set up surveillance points in these three directions of the prison. If this is really a war depot, then whether it is the materials brought in by the devils or the materials shipped out, we can see whether it is right or not, but we are worried that the risk of setting up surveillance points around the prison is too high. ”

Hua Zhang nodded and said, "That's right, that's the case." ”

Seeing this, Fan Keqin used his pen in the direction of the three monitoring points, and extended it perpendicular to the prison, and said: "But what if we extend it in the direction of the farther street, that is, the direction of the three cities, out of the prison area." At the entrances of these streets, surveillance points have been set up, so if it is a war reserve in the prison, regardless of the entry and exit of materials, can we also observe through these monitoring points? ”

Hua Zhang immediately understood what he meant, nodded, and said, "That's right, it's just that after extending outward, there are more street intersections and road sections that need to be monitored, so we need to build more eyes and use more manpower." However, out of the confines of the prison, the security will also increase. ”

"Yes." Fan Keqin said: "That's what I meant. ”

What do you mean? That is to say, for example, point A is the target you want to monitor, then you are in the nearest place, such as at the opposite door of point A, or at the door, then you only need one monitoring point to monitor the entry and exit of people at point A.

But if you get too close, your chances of being spotted will increase. On the other hand, if you want to pull out, you need to set up surveillance points at the intersections on both sides of the street where point A is located. The monitoring points have also become two.

If point A is very alert and you need to pull farther to set up a lookout, then there is a three-way intersection on the street where the two sides meet. Then you can only build eyes on the far end of the three-pronged street on each side. That is, it needs to be turned into six monitoring points to complete the monitoring of the entry and exit of people at point A.

That's what Fan Keqin said. There is no way to set up a surveillance point in front of the prison because it is not safe. However, after the zoom is closed, safety is guaranteed, but the establishment of the surveillance point needs to take into account all the roads that may lead to point A. The farther away you are, the more roads you have to get to it, and the more surveillance points you need. The manpower that needs to be mobilized must be improved accordingly.

Hua Zhang said: "Then from tomorrow, we can ...... the far end of the prison" Speaking of this, he drew a semi-arc shape in the direction of the city on the drawing with his hand. Then he continued: "At all the intersections in this circle, we must have a reconnaissance. At the very least, it's an intersection where you can take a car. ”

"Hmm." Fan Keqin said: "It seems that you need to put a dead mailbox for Wang Zhanyuan, you use the dead mailbox to convey this matter to him, and then draw a schematic diagram for him." Otherwise, if you use the phone, I am afraid that it will take a long time to talk clearly. Now we don't have to rush. After all, it also takes time to prevent the water supply headquarters. After letting Wang Zhanyuan and them investigate, they set up all the intersections at the far end of the prison. It's still that principle, safety first. ”

"Yes." Hua Zhang stepped forward and replied, "Brother, are we going to the local library tomorrow?" ”

"Let's take a trip." Fan Keqin said: "It's best to find out something." It just so happens that when we go to the library tomorrow, we'll put the information in the dead mailbox for him. Let's leave in the morning, and around noon, Wang Zhanyuan will receive the letter. ”

"Understood." Hua Zhang replied, took Fan Keqin's pen and paper, and began to write the information to Wang Zhanyuan in detail with his non-dominant hand. Then a picture was also drawn. The annotation is clear. After checking it twice, it was folded and placed in the hollow leg of the bed for the time being. When you go out tomorrow, just take it with you.

Hua Zhang returned to the sofa and sat down again, and said, "Brother, if it's really a war reserve warehouse, what should we do?" The prison was like a small city with walls, and it would be very difficult to attack. ”

Fan Keqin said: "Yes, so it depends on how much information we can have, if we only determine that the combat reserve is in the prison, the rest of the situation, such as the internal structure of the prison, the distribution of sentry posts, etc., is not clear." Then we'll probably have to storm it......"